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TM 5-2420-222-20-3
PRESSURE CONTROL VALVE - CONTINUED
ACTION
LOCATION
ITEM
REMARKS
ADJUSTMENT - CONTINUED
NOTE
Steps 78 thru 80 only apply to loader backhoes with Serial Numbers 319995 thru 342573.
78.
Plug (1)
Packing (2)
a.
If not replaced during assembly,
using pocket knife, take off.
b.
Get rid of.
c.
Place new one in position.
NOTE
There may be one or several washers in plug.
79.
Washers (3)
a.
If pressure reading noted in step 69
was more than 1800 psi (12,411 kPa),
decrease number.
b.
If pressure reading noted in step 69
was less than 1700 psi (11,721 kPa),
increase number.
80.
Pressure housing
Plug (1) with
a.
Screw in and tighten using 1-inch
(4) and spring (5)
assembled parts
open-end wrench.
b.
Repeat steps 68 thru 80.
WARNING
Do not attempt to disconnect hydraulic lines and fittings while engine is running or before
hydraulic system pressure has been released. When engine is running, hydraulic system is under
pressure. Hydraulic system pressure should be 0 psi (0 kPa) before lines are disconnected. A line
or fitting disconnected under pressure will blow off with a lot of force and could cause serious
injury to personnel.
81.
Loader backhoe
Hydraulic system
Release pressure (page 2-1191).
WARNING
Be careful when draining hot fluids. Wear gloves to protect your hands from hot parts and fluids
or severe burns could result.
82.
Front support (6)
Hydraulic pump (7)
a.
Place drain pan underneath to catch
draining fluid.
b. Disconnect multi-range pressure gage
and tube and pipe fitting kit fittings.
2-1214
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